hw2

main/src/main/java/hw2/Calculator.java

@@ -5,16 +5,19 @@ public class Calculator {
     public int add(int a, int b) {
         return a + b;
     }
+
     public int subtract(int a, int b) {
-        // TODO: implementujte tuto metodu
         return a - b;
     }
+
     public int multiply(int a, int b) {
-        // TODO: implementujte tuto metodu
         return a * b;
     }
-    public int divide(int a, int b) {
-        // TODO: implementujte tuto metodu
-        return a / b;
+    public int divide(int a, int b) throws Exception {
+        if (b == 0) {
+            throw new Exception("Nulou nelze dělit!");
+        } else {
+            return a / b;
+        }
     }
 }

main/src/test/java/CalculatorTest.java → main/src/test/java/hw2/CalculatorTest.java

-import hw2.Calculator;
+package hw2;
+
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.params.ParameterizedTest;
@@ -18,4 +19,29 @@ public class CalculatorTest {
         int result = calc.add(num1, num2);
         Assertions.assertEquals(expectResult, result);
     }
+
+    @ParameterizedTest(name = "{0} - {1} should be equal {2}")
+    @CsvSource({"1, 2, -1", "5, 3, 2"})
+    public void subtract_subtractAandB_returnC(int num1, int num2, int expectResult) {
+        int result = calc.subtract(num1, num2);
+        Assertions.assertEquals(expectResult, result);
+    }
+    @ParameterizedTest(name = "{0} * {1} should be equal {2}")
+    @CsvSource({"5, 3, 15", "6, 8, 48"})
+    public void multiply_multiplyAandB_returnC(int num1, int num2, int expectResult) {
+        int result = calc.multiply(num1, num2);
+        Assertions.assertEquals(expectResult, result);
+    }
+
+    @ParameterizedTest(name = "{0} / {1} should be equal {2}")
+    @CsvSource({"15, 3, 5", "64, 8, 8"})
+    public void divide_divideAnadB_returnC(int num1, int num2, int expectResult) throws Exception {
+        int result = calc.divide(num1, num2);
+        Assertions.assertEquals(expectResult, result);
+    }
+    @ParameterizedTest(name = "{0} / {1} cannot be divided by zero")
+    @CsvSource({"15, 0", "64, 0"})
+    public void divide_divideZero_returnException(int num1, int num2) {
+        Assertions.assertThrows(Exception.class, () -> calc.divide(num1, num2));
+    }
 }